Chuck wrench ejector



May 27, 1952 w, GQFF 2,598,119

CHUCK WRENCH EJECTOR Filed May 9, 1949 Patented May 27, 1952 UNITEDSTATES e TENT other: I

GHUGKWBENCH EJEGTOR m Gcfl, St. Paul, Minn; Application May 9,1949,.Serial No. 92,098;

In the operation of a lathe, drill press or: the; like; the operatorwill occasionally forget toremove the wrench or key from thework-holding chuck after the tightening; thereof about a work piece.Rotation of the chuck causes the wrench to-be forcibly ejected undercentrifugal action; and dangerto the operator or other persons nearby,or damage to the machine, often results. The primary object of myinvention, therefore, is the provision of an attachment for chuckwrenches which will automatically remove such a wrench from a chuck uponrelease of manual pressure thereon.

Another highly important object of my invention is the provision of anattachment as set forth, which will protect the chuck-engaging head ofthe wrench when said wrench is not in use.

Still another object of my invention is the provision of an attachmentas set forth, which may be quickly and easily secured to a chuck wrenchor key.

A still further object of my invention is the provision of a device asset forth, which is inexpensive to manufacture, simple and rugged inconstruction, and efiicient and durable in use.

Other highly important objects and advantages of my invention willbecome apparent from the following detailed specification, appendedclaims, and attached drawings.

Referring to the drawings, in which like characters indicate like partsthroughout the several views:

Fig. 1 is a view in side elevation of my novel attachment secured to achuck wrench and applied to a lathe chuck;

Fig. 2 is an enlarged fragmentary view, partly in plan and partly inside elevation, taken substantially on the line 2-2 of Fig. 1;

Fig. 3 is a still further enlarged view in front elevation of a chuckwrench having my novel attachment applied thereto and shown as beingremoved from a chuck, some parts being broken away and some parts beingshown in section;

Fig. 4 is a view in horizontal section, taken on the line 44 of Fig. 3;and.

Fig. 5 is a horizontal section, taken on the line 5--5 of Fig. 2.

Referring with greater detail to the drawings, a multiple jaw chuck isindicated in its entirety by the numeral I and includes the con- 2ventional' chuck. body 2 and radially-movable jaws 3?.

of the same cross-sectional shape. as the socket 5, in this case;rectangular. At i'tjsj'up er. end,

shank 'i'. is diametrically enlarged? to". p ovid'e'i hea'd' 9i throughwhich" ext nds: a transverse handle it; The chuck wrench 6 'abovedescribed is a type commonly used in connection with chucks in lathes,drill presses, and the like.

My novel attachment includes a tubular housing i I having rigidlysecured to its upper end, by screws or the like I 2, a bushing I3. Thebushing I3 is of a size to slide axially over the shank I of the wrench6 and may be locked in placed by a set screw i4 having screw-threadedengagement therewith. It will be seen, by reference to Figs. 2 and 3,that the lower end of bushing 13 provides an annular shoulder l5 for apurpose which will hereinafter become apparent. At its lower end, thehousing I l is provided with a radially inturned flange it which definesan opening ll. A sleeve [8 concentric with the tubular housing II andshank I is mounted for axial sliding movements in the opening I! and isprovided at its upper end with an outturned flange l9 which is adaptedto engage the inturned flange it of the housing ll upon axial movementof the sleeve [8 outwardly of the housing Ii. A coil compression spring20 has its upper end abutting the annular shoulder it: of the bushing l3and its lower end exerting yielding bias on the outturned flange [9 ofthe sleeve [8.

When the tubular housing I l is properly located on the shank 1, thesleeve 1 8 encircles the head 8 of the wrench 6, as shown in Fig. 3.When it is desired to loosen or tighten the jaws 3 of the chuck l, thehead 8 is inserted into the socket 5 of the chuck i. As illustrated inFig. 2, insertion of the head 8 into the socket 5 causes the sleeve iiito move axially inwardly to the interior of the housing ll against biasof the coil compression spring 20. Manual pressure must be exerted uponthe wrench or key 6 to maintain engagement of the head 8 in the socket5. Upon release of manual pressure upon the wrench B, bias of the spring20 will tend to move the sleeve l8 axially outwardly from the housing llagainst the jaw-actuating element 4 and cause the head 8 to beautomatically withdrawn from the socket The usual .jaw actuating"element or. screw 12' is provided with a socket" 5' which usuallyrectangular. in cross-section to receive.

5. Thus, the operator is prevented from ac cidentally leaving the wrenchin the chuck.

It is important to note that the sleeve I8 is of sufficient internaldiameter to enable it to slide freely over the lower end portion of theshank I. The sleeve 18 forms a protection for the head 8 when the wrenchB is not being used and prevents the corners thereof from becomingdented or otherwise distorted from impact with other objects, or in theevent that the wrench is dropped.

From the foregoing, it will be obvious that I have provided a devicewhich is capable of accomplishing the above objects; and, while I haveshown a preferred embodiment of my invention, it will be understood thatthe same is capable of modification without departure from the spiritand scope of the invention as defined in the claims.

WhatIclaim is:

1. An ejector for a manually-operated chuck 7 internal annular shoulderat its opposite end portions, said yielding means comprising a coilcompression spring encompassing said shank and having its opposite endsabutting said annular shoulder and the flange on said sleeve.

JOHN W. GOFF.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 887,644 Jacobs May 12, 19082,067,370 Woock Jan. 12, 1937 2,277,945 Ashleman Mar. 31, 1942 2,388,414Jernigan Nov. 6, 1945 2,442,717 Willette i June 1, 1948 2,488,894Barrett Nov. 22, 1949

